Spectral analyses of the reactant and product IR spectrum of 1-butanol: Identify

Question

Spectral analyses of the reactant and product IR spectrum of 1-butanol: Identify the bond responsible for the broad peak centered around 3350 cm^-1. Identify the bond responsible for the peaks just below 3000 cm^-1. How many peaks do you expect in the 1H NMR spectrum of 1 -butane? What is the m/z value of the molecular ion peak of 1 -butane in the mass spectrum? How many peaks do you expect in the 1H NMR spectrum of 1-bromobutane? What will be the ratio of the intensities M peak (molecular ion peak) and M+2 peak in the mass spectrum of 1 -broom butane?

Explanation / Answer

1) -OH hydrogen bonded (broad peak at 3350cm-1)

2) peak at just below 3000cm-1 is due to alkyl C-H in 1-butanol

3) 5 peaks in 1H NMR of 1-butanol

4) m/z =56 is the molecular ion in 1-butanol

5) 4 peaks in 1H NMR of 1-bromobutane

6) 1:1

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